<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
  
     .in:focus{
        outline: 1px solid rgb(211, 75, 21);
     }
</style>
<body>
    <form action="">

        <input type="text" class="in" >
    </form>
</body>
</html>